Заменить глаголы в Present Indefinite на Past Indefinite, Present Continuous, Present Perfect :
1. She writes letters.
2. I speak English.
3. They work at school.
4. You read books.
5. He visits our city.

1. she wrote letters

she is writing letters

she has written letters

2. i spoke english

i am speaking english

i have spoken english

3. they worked at school

they are working at school

they have worked at school

4. you read books

you are reading books

you have read books

5. he visited our city

he is visiting our city

he has visited our city

Объяснение:

Заменить глаголы в Present Indefinite

1. She writes letters.

2. I speak English.

3. They work at school.

4. You read books.

5. He visits our city.

на

Past Indefinite,

1. She wrote letters.

2. I spoke English.

3. They worked at school.

4. You read books.

5. He visited our city.

Present Continuous,

1. She is writing letters.

2. I am speaking English.

3. They are working at school.

4. You are reading books.

5. He is visiting our city.

Present Perfect :

1. She has written letters.

2. I have spoken English.

3. They have worked at school.

4. You have read books.

5. He has visited our city.